Dual-Port T1 or E1 with ISDN BRI Chassis

The J2300 Dual-Port T1 or E1 with ISDN BRI chassis has two Fast Ethernet LAN ports, two T1 or E1 WAN ports, and one ISDN BRI port. The ISDN BRI interface is the backup interface to the primary T1 or E1 interface and provides ISDN failover support for a T1 or E1 connection.

The E1 chassis has an ISDN BRI S/T port (Figure 20), and the T1 chassis has an ISDN BRI U port (Figure 21).

The T1 or E1 with ISDN BRI chassis provides the following key features:

• Onboard network processor
• Integrated CSU/DSU—Eliminates the need for a separate external device
• Framed, unframed (E1 only), and fractional operational modes
• 56-Kbps and 64-Kbps modes
• ANSI T1.102, T1.107, and T1.403 standards compliance
• G.703, G.704, and G.706 E1 standards compliance
• Independent internal and external clocking system
• Local and remote loopback, bit error rate test (BERT), T1 facilities data link (FDL), and long buildout diagnostics
• Bandwidth on demand
• Dial backup
• Dial-on-demand routing backup

For pinouts of cable connectors for the network ports, see Network Cable Specifications and Connector Pinouts.

For alarms, see configuring and monitoring alarms information in the J-series Services Router Administration Guide.

Table 17 describes the meaning of the LEDs for a Fast Ethernet port, Table 22 describes the meaning of the status LED for a T1 or E1 port, and Table 23 describes the meaning of the status LED for an ISDN BRI port.

Table 22: Status LEDs for T1 and E1 Ports

Table 23: Status LED for ISDN BRI Port